[ Subject Verb Agreement ]
One group of researchers ___ studying about the source of Covid-19.
A. is
B. are

Random Topics:
Passive and Active VoiceConditional Sentences and Adverbs-ed or -ingGerund - to Infinitive DeterminersInfinitives and GerundsPronouns/ Present TenseCoherent Sentence with Correct Grammar StructureGrammar - Present Perfect with for and sinceRegular Plural NounsOther quiz:
Grammar › ViewMy friend asked me ______ much the lessons cost.
A. How
B. what
C. when
Mixed General Quiz › View
“Texas, Our Texas” is ___ state song.
a. a
b. an
c. the
Identify the conjunction in the sentence.
He can buy the book, or he can borrow it from the library.
A. can
B. or
C. the
Vocabulary › View
The opposite of motivate is
A. cure
B. discourage
C. cheer up
